Hybrid Vigor in Pacific Oysters: An Experimental Approach Using Crosses Among Inbred Lines.
Hedgecock, D., D. J. McGoldrick, and B. L. Bayne. 1995. Hybrid vigor in Pacific oysters: An experimental approach using crosses among inbred lines. Aquaculture 137:285-298. This study was the first experimental demonstration that crosses of inbred parent lines produced hybrid vigor for yield in the Pacific oyster. Yield or the amount of biomass produced per unit area or volume is a composite trait, reflecting both survival and growth. This paper follows Griffing (1990) in defining hybrid vigor as performance of hybrid offspring exceeding that of the better parent.